title: Impact of electric quadrupolar coupling on the optical response of an array of nano-objects.
abstract: Intra- and inter-particle coupling effects are important but have not been properly taken into account in modeling the optical response of an array of nano-objects. In this paper, we present a method to analyze the impact of electric quadrupolar coupling on the optical response of a layer of silver nanorods fabricated with oblique-angle deposition (OAD). Our technique can render the non-locally coupled nano-objects into an array of coarse-grained induced charges. The retrieved polarizability tensor of the silver nanorods exhibits non-zero off-diagonal components, revealing information about the array structure and inter-particle quadrupolar couplings. Thus, a more transparent picture of the correlation between the function and structure of an optical metamaterial can be yielded.
authors.affiliation: Department of Photonics and Institute of Electro-Optical Engineering, Chiao Tung University, Taiwan, Republic of China.
authors.forename: Chien Y
authors.initials: CY
authors.lastname: Lin
authors.forename: Yun H
authors.initials: YH
authors.lastname: Wang
authors.forename: Jung Y
authors.initials: JY
authors.lastname: Huang
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Liu
authors.forename: Yiping
authors.initials: Y
authors.lastname: Zhao